KR101301136B1 - Air bag device - Google Patents

Abstract

The present invention relates to an airbag apparatus, in which a gas rectifying member (12 ') which rectifies and guides gas generated from the inflator (30) to the vicinity of an expanded portion at the beginning of deployment of the airbag (10) is a central portion of the airbag (10). It is characterized in that it is installed in the airbag 10, the folded state of the airbag 10 provides an airbag device excellent in the three-dimensional protection performance that is properly deployed in order from the site to be originally deployed.

Description

Air bag device {AIR BAG DEVICE}

 The present invention relates to an airbag apparatus of an automobile

For example, as shown in FIG. 17, the airbag apparatus is provided in the center part of the steering apparatus 50P, the display member 40P is located in the center part of the airbag apparatus, and it has a tialine in the back periphery. The airbag cover 16P which can be ruptured by the some cover part 16Pb at the time of the expansion and expansion of an airbag is provided, and the airbag and inflator folded in the airbag cover 16P are accommodated (refer patent document 1).

The airbag apparatus shown in FIG. 18 and FIG. 19 is sectional drawing which shows the other airbag apparatus which has the structure similar to FIG. In the inflator 30R of the airbag apparatus, a diffuser 32R provided with a gas discharge hole 30Ra for discharging gas is disposed, and the inflator mounting opening of the airbag 10R is fixed at the position Q, which shows the airbag 10R. A regulating belt 11Ra for regulating the length at which the elongation starts is provided at the center of the head), and the end thereof is fixed by a fixture provided at the head of the inflator.

 As can be seen from FIG. 18, a diffuser 32R provided with a plurality of gas discharge holes 32Ra is disposed between the inflator 30R and the air bag 10R folded and housed therein. At the time of operation of the inflator 30R, the gas generated from the inflator 30R applies a gas pressure to the center portion of the air bag 10R that is directly folded and stored through the gas discharge hole 32Ra. (See Patent Document 2)

 In the above configuration, when the inflator 30R is operated, the gas pressure is concentrated in the center portion of the folded airbag 10R, and the folded state of the folded airbag 10R collapses, which is higher than the hole of the gas discharge hole 32Ra. Airbag portion is pushed out at once in the airbag deployment direction to break the tialine 16Ra provided on the back surface of the airbag cover 16R, and these airbag portions protrude largely toward the driver's seat side.

 The remaining airbag portion is also released to the driver's seat side at a time by the inertia force of the protruding airbag portion. Said protruding is said to be a "punching phenomenon," the maximum protruding velocity of the airbag portion may be a high speed of 300 km per hour and may cause harm to the passengers.

 In the invention described in Patent Document 2, as an countermeasure against this punching phenomenon, the opening for the deployment of the airbag 10R at the time of breakage of the airbag cover 16R is made smaller and the airbag 10R does not protrude at once. It is thought that reduction of the addability by the punching phenomenon mentioned above is aimed at. However, when the opening is made smaller, when the airbag 10R folded and stored is pushed out toward the opening at once, the airbag 10R is located in the vicinity of the opening by the gas pressure that is blocked by the cover opening and added from the rear. It is difficult to get out of the driver's seat.

 In this state, the gas pressure in the airbag 10R rises, and the airbag cover 16R itself expands, and the airbag 10R may be discharged by adding speed while forcibly opening the opening. In addition, in the case where the part which has escaped from the opening part at the beginning of the airbag 10R first pops out and partially expands and expands, the deployment direction of the entire airbag is changed. The ability to protect the circle deteriorates.

 Next, an example of another conventional airbag apparatus is demonstrated. 20 is a cross sectional view thereof. As shown, the airbag 10L is folded and accommodated between the airbag cover 16L and the inflator 30L. A substantially h-shaped tialine 16La is formed on the rear surface of the front wall of the airbag cover 16L, and the inflator mounting hole of the airbag 10L is fixed to the flange 30Lb provided on the outer periphery of the inflator 30L. have. (See Patent Document 3)

 In the airbag apparatus, when the inflator 30L is operated, gas pressure concentrates on the entire rear portion of the folded airbag 10L, and a mass of the airbag 10L above the hole of the gas discharge hole 30La is formed. It pushes out at once in the airbag deployment direction and breaks the substantially h-shaped tialine 16La provided on the back of the airbag cover 16L, and these airbag portions protrude largely on the passenger seat side.

Although it is possible to suppress the rapid protruding of the airbag by a special folding method, it is usually necessary to fold the envelope which is difficult to unfold in order to suppress the rapid protruding of the airbag, resulting in a problem that the unfolding time until full deployment is delayed. . On the other hand, the above-mentioned punching phenomenon occurs when the airbag is folded up so as not to slow down the deployment time.

 Fig. 21 is a diagram showing the deployment state of the airbag for each elapsed time from the beginning of deployment of the airbag of the conventional airbag apparatus. The dummy posture is in a state close to the airbag (this state is called a state of out-of-position rather than a regular seating position, hereinafter abbreviated as " OOP state "). The airbag is formed in the bag shape which can be developed in a flat spherical shape (elliptical shape when viewed from the side) by sealing the outer peripheries of two substantially circular base fabrics and creating a sewing portion P. Therefore, when the expansion is completed, the sewing portion P is located at the center of the side surface of the flat spherical airbag.

 21A to 21D, when the sewing portion P of the airbag is inflated to the dummy neck, the portion caught in the dummy neck just before the airbag is fully inflated is suppressed at the completion stage of the inflation of the airbag because the expansion is suppressed. The portion where the diameter of the airbag is maximized, especially the portion where the diameter of the airbag is maximized, may be inflated at once, which may cause injury to the neck. The phenomenon which occurs in order that the gas of the inflator raises the airbag internal pressure at once in the completion step (phenomena in which the airbag internal pressure rises at once from the relaxed state and the upward dimension is transmitted to the airbag) is called a "membrane phenomenon".

 In addition, the folding method of the airbag is (1) a folding method in a cornice shape, (2) a folding method in a roll shape, and (3) a folding method in a cornice shape in a direction in which the airbag starts to extend three-dimensionally (see Patent Document 2). Disclosure) and the like. Patent Document 3 does not describe in which way the airbag is folded, but except for the above-described special folding method, the punching phenomenon occurs in the folding method of any airbag. However, as a preventive measure of the membrane phenomenon in the above-mentioned 0OP state, there was no concrete measure other than adjusting the opening method of the airbag cover.

Patent document 1: US6739620 specification

Patent document 2: US2001 / 42978 publication

Patent Document 3: Japanese Unexamined Patent Publication No. 3-38254

The present invention provides an airbag device that can prevent the punching phenomenon from being folded and stored in any manner, and can reduce the likelihood of going up to 3D even in the 0OP state, and is excellent in the 3D protection performance in normal deployment. In addition, it can also be used for airbag devices of passenger seats and passenger seats, and the airbags can be gently released at relatively low pressure, and pressure loss can be reduced, and the strength of individual members such as housings and covers can be reduced. The structure is simple and does not need to be reinforced more than necessary to provide a cheap airbag device.

In order to achieve the object of the present invention, the invention of claim 1 maintains the airbag and the airbag inflated by the gas generated from the inflator in communication with the inflator and the inflator, and presses the outer peripheral side of the airbag to at least initially deploy the airbag. In the airbag device comprising a holding member for suppressing the expansion of the airbag in the lateral direction of the airbag by the gas generated from the inflator to the gas rectification to rectify the gas generated from the inflator to the vicinity of the portion inflated at the beginning of the deployment of the airbag And the member is installed at an approximately center portion of the airbag.

 The invention according to claim 2 is characterized in that in the airbag apparatus according to claim 1, the airbag is folded and housed on an outer circumferential side of the gas rectifying member.

 In the airbag apparatus according to claim 1 or 2, in the airbag apparatus according to claim 1 or 2, the gas rectifying member has a cylindrical shape, and the airbag is provided with an inflator communication port communicating with an inflator, so that the gas rectifying member has an airbag around the inflator communication port. It extends to the vicinity of the part which expands in the initial stage of expansion.

 The invention of claim 4 is characterized in that the gas rectifying member is made of a woven fabric in the airbag apparatus according to any one of claims 1 to 3.

 The invention of claim 5 is the airbag apparatus according to any one of claims 1 to 4, wherein the gas rectifying member is arranged as a member having a function of protecting the airbag from heat or shock pressure of the inflator.

 In the sixth aspect of the invention, in the airbag apparatus according to any one of claims 1 to 5, the airbag is folded in a cornice shape in the upward dimension direction.

 The invention of claim 7 is the airbag apparatus according to any one of claims 1 to 6, wherein the holding member is made of a woven fabric to be stored in a state of covering the airbag.

 According to an eighth aspect of the invention, in the airbag apparatus according to any one of claims 1 to 7, the holding member is housed in an airbag cover.

 According to a ninth aspect of the present invention, in the airbag apparatus according to claim 8, a tialine is provided on the rear surface of the airbag cover that ruptures during gas generation of the inflator to form an airbag deployment port.

 The invention according to claim 10 is the airbag device according to any one of claims 1 to 9, wherein a restrictor belt is disposed in the airbag to regulate a length at which the airbag starts to extend to the ascension side. do.

 Invention of Claim 11 is an airbag apparatus as described in any one of Claims 1-6 WHEREIN: It uses the airbag cover instead of the said holding member, It is characterized by the above-mentioned.

 In the airbag apparatus according to claim 11, the protection member in the airbag cover is provided with a tialine at an opposing position of an inflated portion at the beginning of deployment of the airbag for rectifying and guiding the gas. It is done.

1 is a front view showing a mounting state of a handle of an airbag device.

FIG. 2 is a cross-sectional view taken along line II of FIG. 1.

3 is a perspective view showing the back surface of the base plate.

4 is a perspective view of the connecting member.

Fig. 5A is a front view of the cushion ring, and Fig. 5B is a side view showing a part thereof in cross section.

Fig. 6A is a perspective perspective view showing the inside of an airbag in an inflated state, and Fig. 6B is a perspective view showing an unexpanded state of the airbag.

7 is a conceptual diagram showing an operation procedure of folding an airbag using an airbag folding machine.

FIG. 8A is an exploded view before covering the airbag of the retaining member, FIG. 8B is a perspective view of the airbag on the back side folded and folded, FIG. 8C is a perspective view showing the airbag covered with the retaining member, and FIG. 8D is a view of the airbag covered with the retaining member. It is the back view.

9 is an exploded view of a peripheral protective member that protects the periphery of the inflator mounting tool.

10A is a perspective view of the airbag cover, and FIG. 10B is a back view.

It is a figure which looked at each cover part of the open state from the elevation dimension side.

Fig. 12 is a diagram showing the deployment operation of the airbag apparatus, Fig. 12A is the deployment initial stage, and Fig. 12B shows the inflated state of the airbag at deployment completion.

It is a figure which shows the deployment state of the airbag for every elapsed time from the beginning which the airbag of the airbag apparatus of 1st Embodiment deploys.

It is a figure which shows the passenger-side airbag apparatus which is 2nd Embodiment.

15 is an enlarged view showing the clamping state of the gas rectifying member, the airbag, and the holding member.

16 is a schematic enlarged longitudinal sectional view of a passenger-side airbag apparatus.

17 is a front view illustrating a mounting state of a conventional airbag device to a handle.

It is a figure which shows the deployment state of the conventional airbag.

It is a figure which shows the storing state of the conventional airbag.

20 is a view showing a storage state of another conventional airbag.

Fig. 21 is a diagram showing the deployment state of the airbag for each elapsed time from the beginning of deployment of the airbag of the conventional airbag apparatus.

** Description of reference numerals indicating main parts **

10a ... airbag body, 11a ... cylindrical regulating belt,

12 ... protection member, 12 'gas rectifying member, 14 holding member,

16 airbag covers, 20 connecting members, 22 cushion rings,

24 base plate, 30 inflator.

EMBODIMENT OF THE INVENTION Hereinafter, the airbag apparatus M1 for driver's seat which is 1st Embodiment of this invention is demonstrated with reference to attached drawing. 1 is a front view showing a mounting state of a handle of an airbag device, and FIG. 2 is a cross sectional view taken from the line I-I of FIG. As shown in FIGS. 1 and 2, the airbag device M1 is assembled to the handle center portion of the vehicle and includes a decorative member 40, an airbag 10, and an airbag cover 16. As shown in FIG. In addition, in this specification, the crew side is also called the front side, and this opposite side is called the back side for convenience.

 As shown in FIG. 2, the airbag cover 16 includes an airbag main body 10a and a tubular regulating belt 11a for regulating the length at which the main body 10a starts to extend. The airbag cover 16 is housed in a folded state in a cornice shape toward the surface side (upward dimension side) direction.

 The airbag 10 is covered with a retaining member 14 to press the outer circumferential side thereof to suppress the expansion and expansion of the airbag side direction. The airbag main body 10a and the holding member 14 are fixed to the base plate 24 by a cushion ring 22 inserted into the airbag 10. The airbag cover 16 is fixed to the base plate 24 so as to cover the airbag 10 and the like.

 On the other hand, the end portion of the cylindrical regulating belt 11a is located on the rear side of the recessed portion 16a formed on the side surface of the airbag cover 16, and the mounting bolt protruding on the rear side of the decorative member 40 ( 40a) is clamped between these members by fixing to the connecting member 20 with a nut. The end of the connecting member 20 is sandwiched between the cushion ring 22 and the base plate 24 and fixed to the base plate 24.

 Although detailed description later, reference numeral 12 denotes a protective member, reference numeral 12 'denotes a gas rectifying member, and reference numeral 11C denotes a sewing portion in which a cylindrical regulating belt 11a is sealed to the airbag main body portion 10a.

 The structure of the base plate 24, the connecting member 20, and the cushion ring 22 will be described below.

 FIG. 3 is a perspective view illustrating the back surface of the base plate 24 shown in FIG. 2. The base plate 24 is formed in a substantially disk shape, and a hole 24h for mounting the inflator is formed in the center thereof, and the mounting of the four airbag cover mounting parts 24a and the base plate 24 itself is performed. The pair of mounting parts 24b for cutting are formed by cutting out from the said disk surface. The base plate 24 is for integrally fixing the inflator 30, the airbag 10 and the aforementioned decorative member 40, and the pair of mounting parts 24b for fixing to the steering wheel. .

 The inflator 30 is formed in a generally thick disc shape and is configured to be capable of discharging gas at a predetermined impact instruction. The upper part of the inflator in which the gas discharge hole 30a of the inflator 30 is formed passes through the hole 24h of the base plate 24, while the flange portion formed in the middle part in the thickness direction of the inflator 30 is provided with a base plate ( 24) It is made to be close to the back surface side, and is fixed with the cushion ring 22 through the mounting hole 24c of the base plate 24. As shown in FIG. That is, the gas discharge hole 30a of the inflator 30 is fixed in the state which protruded to the surface side of the base plate 24, and discharge gas from the inflator 30 discharges from the surface side of the base plate 24. FIG. It is supposed to be.

 4 is a perspective view of the connecting member 20 shown in FIG. 2. The connecting member 20 includes a central portion 20a having a hole 20ah to which the mounting bolt 40a fits, and a leg portion 20b and a leg portion 20b, each of which is bent at approximately right angles thereto. It is comprised by the plate-shaped metal component which consists of the mounting foot 20c bent at substantially right angle. The mounting foot 20c is provided with mounting holes 22e corresponding to mounting holes 22a of the cushion ring 22 and mounting holes 24c of the base plate 24, which will be described later. The bolt 22d formed at 22 is simultaneously fixed.

 FIG. 5A is a front view of the cushion ring 22 shown in FIG. 2, and FIG. 5B is a side view showing a part thereof in a cross section. The cushion ring 22 has a substantially rectangular shape as shown in Fig. 5A, and an insertion hole 22h of the inflator 30 is provided at the center portion thereof, and a cushion ring (3) is formed at each corner around the insertion hole 22h. A bolt 22d for attaching 22 to the base plate 24 is provided on the rear side thereof. In addition, the back surface of the cushion ring 22 constitutes a contact surface 22b so as to be in contact with the surface side of the base plate 24 via an air bag 10, and at the same time, the contact surface 22b is a side view thereof. As can be seen from 5B, a concave portion 22c formed by, for example, a cross processing is formed. Tightening of the concave portion 22c is formed at a depth substantially equal to the thickness of the mounting foot 20c of the connecting member 20 when the cushion ring 22 is connected to the connecting member 20.

The airbag 10 will be described with reference to FIGS. 6A and 6B.

FIG. 6A is a perspective perspective view showing the inside of the airbag 10 in an inflated state, and FIG. 6B is a perspective view showing an uninflated state of the airbag 10. In addition, the decoration member 40 arrange | positioned in the cylindrical regulating belt 11a, the inflator 30 couple | bonded with the decoration member 40, etc. for simplicity are not shown in figure.

 The airbag main body portion 10a is formed in a bag shape that can be developed into a flat spherical shape (ellipse body shape) by sealing two periphery edge portions of a cloth of approximately circular shape. A circular cutout 10h into which the concave portion 16a of the airbag cover 16 is inserted is formed in the substantially central portion of the surface side of the airbag main body portion 10a, and an inflator and an inflator are connected to the substantially central portion of the rear surface side thereof. An inflator mounting hole 10ah is formed for introducing gas generated through the airbag into the airbag, and bolt 22d of the cushion plate 22 is disposed on the periphery 10d of the inflator mounting hole 10ah (see FIG. 5B). Four small holes 10b for passing through are formed.

 Around the inflator mounting opening 10ah of the airbag 10, a protective member 12 for protecting the airbag from heat or shock pressure generated by the inflator is superimposed on the peripheral portion 10d. In this embodiment, the part which expands the said protection member 12 in the outflow direction of gas, and expands at the initial stage of deployment of an airbag (the airbag part which expands from the circular fracture | rupture plan part 14h of the holding member 14 mentioned later). It is also used as a gas rectifying member having a function of guiding the gas to the vicinity of.

 As shown in Fig. 6A, the protective member 12 is made of, for example, a woven fabric, the shape of which is circular and has a hole in the center, and the diameter of the hole is equal to the diameter of the inner periphery of the inflator mounting hole 10ah. The diameter is made to be three times or more the diameter of the hole, for example. When attaching the protection member 12 to the inflator mounting hole 10ah, the periphery of the periphery 10d of the peripheral part 10d is aligned with the periphery of the hole of the protection member 12 to the periphery of the inflator mounting hole 10ah. ') And its concentric outer periphery 12a'. The protective member 12 has a function as a rectifying member which rectifies gas after the folding member of the protective member and the airbag 10 which protect the shock of a heat | fever or gas pressure. Moreover, although one sheet may be sufficient as the protection member 12, you may use as two or more sheets, and the gas rectifying member may use 1 sheet or multiple sheets of these protection members 12.

 The airbag 10 is comprised of the airbag main body 10a and the cylindrical regulating belt 11a which regulates the length in which the airbag 10 starts to stretch, and the airbag main body 10a has two substantially circular shapes. The outer periphery of the base fabric (the base fabric of the surface part and the base fabric of the rear part) is sewn together, and the sewing part 10c is installed, and the inner and outer surfaces of the sewn air bag can be reversed to develop into a flat spherical shape (elliptical shape). It is formed into a bag shape.

 As can be seen from Fig. 6B, the sizes of the two substantially circular base fabrics are approximately the same. Then, the airbag 10 is folded in a cornice shape so as to be compressed up and down from the state where the entire length is opened in the direction in which the airbag of FIG. 6A starts to extend (upper side in the figure), and is stored in the airbag cover 16. At this time, not only the airbag main body 10a but also the cylindrical regulating belt 11a are folded in a cornice shape along the cylinder longitudinal direction. Further, in the state where the entire length is opened, the length of the cylindrical regulating belt 11a is the length of the airbag body 10a of the base fabric of the surface portion and the length of the airbag body 10a of the base fabric of the rear portion. Is about to boil.

 Next, a method of folding the airbag 10 into a cornice shape so as to compress almost the entire length from the unfolded state up and down in the direction in which the airbag 10 starts to extend (upward in the figure) will be described below. Folding the airbag 10 is carried out using an airbag folding machine. 7A to 7G are conceptual views showing an operation procedure of folding an airbag using the airbag folding machine, and illustrating the operation procedure of folding an airbag using the conceptual diagram.

 The airbag folding machine (60) includes a support (62) for supporting a cylindrical cylindrical regulating belt (11a) as shown in Fig. 7A, and the airbag (10) for receiving the airbag (10) on the same axis and outward. It has the same outer diameter as the said support 62 in the table 61 which has the outer cylinder 63, and the vertical upper position of the said support 62, and the upper end of the regulation belt 11a between the support 62 It is completed with the support part (not shown) which supports the circumferentially narrowing pinhole 64 (refer FIG. 7C) clamped at the edge. Since the outer diameter of the support 62 is smaller than the inner diameter of the insertion hole 22h of the cushion ring 22, the support 62 can rise through the insertion hole 22h as described later. have.

 The airbag 10 has four small holes 10b formed in the periphery 10d (see FIG. 6A) of the airbag 10, and the bolt 22d of the cushion ring 22 passes through as shown in FIG. 7A. The bolt 22d is fastened to four holes provided in the outer peripheral upper end face of the support 62 of the table 61. The head of the support 62 rises through the insertion hole 22h, is inserted into the cylinder of the cylindrical regulating belt 11a, and the airbag main body 10a is provided outside the raised support 62. It is placed on the table 61 in a flat state.

 As shown in FIG. 7B, the head of the supporter 62 shown in FIG. 7A is inserted through the insertion hole 22h of the cushion ring 22 and inserted into the cylinder of the cylindrical regulating belt 11a. When the lower end of the cylindrical regulating belt 11a is pushed up, the airbag main body 10a is also pushed up.

As described above, since the length of the cylindrical regulating belt 11a is approximately equal to half the length of the airbag main body 10a, the support 62 is the length of the cylindrical regulating belt 11a from the table 61. Rises up to a position approximately three times as high as possible, stops at that position, and manually passes through the cylindrical regulating belt mounting hole 11ah into the convex portion at the distal end of the support 62, thereby regulating the cylindrical shape. Position the belt (11a).

 As shown in Fig. 7C, the pincer 64 is lowered to pinch the aligned cylindrical regulating belt 11a to the support 62 and the pincer 64, and to hold the pinch state to maintain the pinch. The earth (62, 63) descends. As shown in FIG. 7D, the operation stops at the point where the support 62 and the pincer 64 are lowered to the position of half the length of the cylindrical regulating belt 11a, and as shown in FIG. Pull the airbag body 10a upward. As a result, the cylindrical regulating belt 11a is folded over at its approximately intermediate position.

 As shown in FIG. 7E, the outer cylinder 63 is lifted from the table 61 to the pinching position of the upper end of the cylindrical regulating belt 11a described above, and the airbag 10 is supported by the outer cylinder 63 and the support 62. I store it in). As shown in FIG. 7F, two plates 65 having semi-circular holes symmetrically from the left and right directions of the outer cylinder 63 at that position slide the upper end of the outer cylinder 63 from the left and right directions to the pincer strip ( 64) into the fitting groove (not shown) provided in the lower end of the.

 As shown in Fig. 7G, by simultaneously lowering the support 62, the narrow end 64, and the outer cylinder 63 in this state, the folded cylindrical regulating belt 11a is folded in the airbag body ( 10a) and folded into a cornice shape. When the compression of the airbag 10 is completed (see FIG. H), after removing the plate 65, the support 62, the pincer 64 and the outer cylinder 63 simultaneously return to their original positions and the airbag 10 End the folding work of).

 In the state where the entire length of the airbag 10 was opened, the length of the airbag body 10a was approximately equal to half the length of the airbag main body 10a, and the length of the airbag 10 was described. The invention is not limited to this length, and the position at which the support 62 is stopped, the position at which the support 62 and the pincer 64 are lowered and stopped, is positioned along the length of the airbag 10. It is decided.

8A is an exploded view before covering the airbag 10 of the retaining member 14. The retaining member 14 is made of a woven fabric and has a substantially square shape, and a circular mounting bolt insertion hole 14hh is provided at the center thereof, and the bolt of the cushion ring 22 is disposed at the center of the four sides of the substantially square and a short side diagonally. Eight holes (14ah, 14bh) hanging over 22d) are installed. Although the mounting bolt insertion hole 14hh of the holding member 14 will be described in detail later, the mounting bolt shown in FIG. 2 when the airbag 10 covered with the holding member 14 is accommodated in the airbag cover 16. It is a hole for insertion through 40a. Reference numeral 14h denotes an approximately circular fracture scheduled portion formed by missing eyes provided on the holding member, and is for facilitating fracture at the beginning of the deployment of the airbag, and the size thereof is the concave portion 16a of the airbag cover 16 and the size thereof. The diameter of the decorative member 40 has a size that can pass.

 FIG. 8B is a perspective view of the back side of the airbag 10 folded over with the holding member 14 and the described airbag folding machine 60 before covering the airbag 10. Four small holes 14ah of the airbag 10 are fastened to the bolts 22d of the cushion ring 22 protruding from the folded airbag 10. After that, fasten the holes (14bh) located on the diagonal to both two bolts (22d) facing each other.

 8C is a perspective view illustrating a state in which the folded airbag 10 is covered with the holding member 14. When covering the airbag 10 with the retaining member 14, the cylindrical regulating belt attaching hole 11ah shown in FIG. 6A is made to overlap with the mounting bolt insertion hole 14hh of the retaining member 14. To cover.

 FIG. 8D is a rear view of the airbag 10 covered with the retaining member 14 of FIG. 8C. Since the protection member 12 enters into the inside of the folded airbag 10 in the form of a cornice, the protective member 12 is disposed so as to be taken out along the inner circumference of the folded airbag 10 as shown in FIG. 8D (or FIG. 2). . By arranging in this way, the protection member 12 exhibits a function as a gas rectifying member. The temporary member of the protective member 12 is disposed so as to follow the inner circumference of the folded air bag 10 as shown in FIG. 8D (or FIG. 2). The protective member 12 is hereinafter referred to as a gas rectifying member 12 ′. It is called. Then, the cylindrical regulating belt attaching hole 11ah overlapped with the insertion hole 14hh by covering with the holding member 14 is approximately the center of the inflator mounting hole 10ah, in other words, to expand in the initial stage of deployment of the airbag. The gas rectifying member 12 ′ formed to the vicinity of the portion is disposed approximately at the center. The gas rectifying member 12 'mounted on the inflator mounting hole 10ah described above is folded and folded as shown in Fig. 8D, and the wrinkles 12a having overlapped and folded surfaces are held in the state held by the retaining member 14. Is formed.

 On the other hand, in the state where the airbag 10 held by the retaining member 14 is housed in the airbag cover 16, as shown in FIG. 2, the gas rectifying member 12 'is provided with an inflator mounting opening ( 10ah) extending from the cushion ring 22 to the surface side direction along the inner wall of the airbag 10 from the cushion ring 22 to the vicinity of the front end of the folded folded cylindrical regulating belt 11a, which is the portion that expands at the beginning of the airbag deployment. Doing. The shape of the gas rectifying member 12 'in the above state is a cylindrical shape. The gas rectifying member 12 ′ is formed with a crease 12 a in which the layers are folded and folded on the surface. Thus, a protective member that protects the heat or gas pressure shock around the inflator mounting hole 10 ah of the air bag 10. As it has a large effect and its shape is cylindrical, it has a function as a rectifying member for rectifying gas.

 From the back surface side of the airbag 10, the bolt 22d of the cushion ring 22 inserted at the time of folding is projected from the periphery of the inflator mounting part. Since the structure of the holding member 14 described above covers the airbag 10 with the holding member 14, the outer circumferential side surface of the airbag 10 can be pressed, so that it is generated from the inflator at the beginning of deployment of the airbag 10. The expansion and expansion of the airbag 10 in the lateral direction due to the gas can be suppressed.

 9 is an exploded view of the peripheral protective member 70 for protecting the peripheral portion 10d of the inflator mounting hole 10ah. The peripheral protective member 70 is made of a woven fabric, and a silicone rubber is coated on the surface thereof. The peripheral protective member 70 has a substantially circular shape, and an insertion hole 70ah for inserting the inflator 30 is provided at the center thereof and four holes 70b for inserting the bolt through the outer circumference thereof. Is being formed. The peripheral protective member 70 inserts the connecting member 20 from the back side of the cushion ring 22, and the peripheral portion 10d of the inflator mounting hole 10ah when sandwiched and fixed by both members 20 and 22. Is to prevent damage by the edge of the connecting member (20).

 In addition, although the periphery protection member 70 was abbreviate | omitted and demonstrated in the procedure which covers the airbag 10 with the holding member 20 shown in FIG. 8B, the holding member 14 caught by the bolt 22d in the center of the said four sides. The airbag 10 is held by the holding member 20 after the hole 14b of the peripheral protective member 70 is inserted into the bolt 22d before the hole 14ah is fastened to the bolt 22d. ) In the case where the material of the protective member 12 is made of the same cloth as the airbag 10, the protective member 12, which is fabricated with a cloth having a predetermined width and sealed on the periphery 10d of the inflator mounting hole 10ah, is described in a cylindrical form as described above. Place it. The length of the protection member 12 needs the length which touches the vicinity of the part which expands in the initial stage of deployment of the airbag 10, and the length which touches the front-end | tip of the folded cylindrical control belt 11a is preferable, for example. .

 The material of the protection member 12 may be a material different from the material of the airbag 10, for example, a sheet made of a synthetic resin, a material having a function of rectifying gas, and having a flexible material. In this case, the airbag 10 and the synthetic resin sheet may be fixed by appropriate means. The protective member 12 can also be implemented as a separate body without being fixed to the airbag 10. In the case of a separate body, it is not limited to the sheet | seat made of synthetic resin, but also a metal thing is good. Also in this case, the gas of the inflator may be rectified so that the gas flows only in the portion in which the airbag expands at the beginning of deployment of the airbag. The protection member 12 may be integrally fastened to the bolt 22d of the cushion ring 22, may be completely attached as a separate body, may be welded to the base plate 24, or may be formed by turning the depth thereof.

 Subsequently, the assembling work of the airbag device M1 is the same as the work described above. As described above, the length of the protective member 12 needs to be close to the vicinity of the inflated portion at the beginning of the deployment of the airbag, and preferably the length to reach the tip of the folded cylindrical regulating belt 11a. .

 10A is a perspective view of the airbag cover 16. The airbag cover 16 is formed in a substantially arm shape by synthetic resin as shown, and has provided the recessed part 16a for accommodating the decorative member 40 as already described in the center part.

 The airbag cover 16 is riveted to the base plate 24 via its mounting part 24a. In addition, in the state where the decorative member 40 is attached to the recessed part 16a of the airbag cover 16, as shown in FIG. 2, the surface of the decorative member 40 is substantially equal to the surface of the airbag cover 16. As shown in FIG. It becomes a state.

 10B is a rear view of the airbag cover. As shown in the drawing, the back surface of the airbag cover 16 has a groove-shaped tialine L1 to L4, which can be ruptured by leaving a central concave portion 16a fixed by the connecting member 20 in the expansion and expansion of the airbag 10. Lc) is formed. That is, the round tialine Lc around the recessed part 16a so that the recessed part 16a may be left in the back surface of the airbag cover 16 so that the recessed part 16a may be divided into a plurality of cover parts 16b. And a series of tialines consisting of a plurality of, for example, four thialines (L1 to L4) extending radially from the thialines (Lc). Moreover, the airbag cover 16 is divided into each cover part 16b at the time of the inflation of the airbag 10, and is fixed by rivet so that each may open independently.

 In the above configuration, when the inflator 30 is operated and the airbag 10 is inflated and deployed by gas pressure, the airbag cover 16 is pressed and divided in the tee line L portion around the decorative member 40 by the force. The cover parts are open to the outside, respectively, leaving the central recess 16a in the arm shape, and as described above, they are completely separated and each independently opens.

 FIG. 11 is a view of each cover part 16b in an open state as seen from the surface side (high dimension side). As shown, the airbag cover 16 is divided into respective cover parts 16b at the time of deployment of the airbag 10, and after the airbag 10 passes through the fracture scheduled portion 14h of the retaining member 14. Does not inhibit the development in the lateral direction. In addition, in FIG. 11, the airbag etc. are not shown for simplicity.

 Moreover, although the example which accommodated the airbag 10 hold | maintained by the holding member 14 in the airbag cover 16 was shown in said embodiment, instead of holding the airbag 10 by the holding member 14, it is an airbag. It can also hold and hold only the cover 16. In this case, the side surface of the airbag cover 16 does not rupture after deployment of the airbag 10 as shown in FIG. 11, and the approximately circular fracture scheduled portion of the holding member 14 as described above in FIG. 8A ( By forming a tialine having the same shape as the opening formed by 14h) in the airbag cover 16, the airbag 10 can be held and stored only by the airbag cover 16 without using the holding member 14. The opening-type tialine formed in the airbag cover 16 is provided at a position opposite to the portion in which the gas rectifying member 12 'expands at the beginning of deployment of the airbag for rectifying and guiding the gas.

Here, the assembling procedure of the airbag apparatus M1 is demonstrated with reference to FIGS. 3-5, 8, and 10. FIG.

At the time of assembly, the airbag 10, which has been previously housed in the airbag cover 16 with the cushion ring 22 therein and is packed with the retaining member 14, is provided with the holes 16ah and the airbag 10 of the airbag cover 16. The cylindrical control belt mounting hole 11ah is aligned and stored. Then, the connecting member 20 is inserted into the airbag 10 so that the position of the central hole 20ah and the cylindrical regulating belt mounting hole 11ah coincide with each other, and at the same time into the airbag 10 shown in Fig. 8D. The hole 22e of the connecting member 20 is inserted into the bolt 22d protruding from the concave portion 22c of the inserted cushion ring 22, and the mounting foot 20c is inserted into the concave portion 22c. Put it in.

 The mounting bolt 40a of the decorative member 40 is inserted into the hole 16ah of the recessed part 16a of the airbag cover 16 from the surface side, and is arrange | positioned according to the position of the hole 16ah. Each hole of the hole 16ah of the airbag cover 16, the cylindrical regulating belt attaching hole 11ah of the airbag 10, and the hole 20ah of the central portion of the connecting member 20 is attached to the mounting bolt 40a. Passes through the insertion. As the nut is screwed into the mounting bolt 40a, the mounting bolt insertion hole 14hh and the cylindrical regulating belt mounting hole 11ah are connected to the recess 16a of the airbag cover 16 and the connecting member 20. It is pinched and fixed between the center part 20a of ().

 Next, the hole 24c of the base plate 24 is inserted into the bolt 22d of the cushion ring 22 to overlap both the members 22 and 24 with the base plate 24 and the airbag cover 16. The inflator 30 to the bolt 22d and screw the nut to the bolt 22d. As a result, the inflator mounting hole 10ah and the protective member 12 are clamped between the cushion ring 22 and the connecting member 20. Thereby, the assembly of the airbag apparatus M1 shown in FIG. 2 is completed.

 The deployment operation of the airbag apparatus M1 will be described with reference to FIGS. 12A and 12B. First, by the impact detection at the time of a vehicle collision or the like, the inflator 30 is ignited to generate gas into the inflator 30, and the gas is introduced into the airbag 10. The airbag cover 16 receives its force when the airbag 10 starts to inflate, and splits along the tee lines L1 to L4 and Lc, ie, leaving a central recess 16a so that each air cover part 16b is radiated. Spread in shape.

 In the initial stage when the airbag 10 begins to inflate after the airbag cover 16 is broken, the base of the airbag 10 which starts inflation at the beginning of deployment when gas is introduced into the airbag 10 as shown in FIG. 12A. The cylindrical regulating belt 11a; The surface portion of the airbag 10 rides while wrapping the concave portion 16a while expanding and expanding from the sewing portion 11c where the central portion of the cloth and the cylindrical regulating belt 11a are sewn. Inflate to the circle side. At the time of the expansion, since the cylindrical regulating belt 11a is folded over in the longitudinal direction of the cylinder, there is little resistance when it starts to stretch. When inflating and deploying from the sewing portion 11c, the airbag 10 passes through the break scheduled portion 14h of the retaining member 14 and expands to the upward dimension while being subjected to resistance. Therefore, the state where the folded state of folding is not collapsed in the middle part while expanding while maintaining the internal pressure to a certain extent, and it is developed from the surface portion on the upward dimension side to the upward dimension in order.

 By the way, FIG. 12A has shown the state in which the cylindrical regulating belt 11a extended the whole length. Although a part of the back part expands and expands on the elevation dimension side, the position of the sewing portion 10c which stitches the outer circumferential portions of the two substantially circular cloths of the airbag 10 is located near the handle 50. And other portions of the back portion are still housed in the retaining member 14. After the airbag is inflated to some extent, as shown in Fig. 12B, the position of the sewing portion 10c moves from right to left to move to almost the center of the centerline of the cylindrical regulating belt 11a to become a flat spherical shape. Complete the expansion of the expansion. Reference numeral 12 'is a gas rectifying member.

In this way, as the cylindrical regulating belt 11a starts to increase in length and stops, the behavior of causing the deployment of the airbag 10 to the upward dimension to stop is indicated by the airbag cover 16 in order to obtain a bursting force. The internal pressure of the airbag increases temporarily, and immediately after the airbag cover 16 ruptures, the above-mentioned cylindrical regulating belt 11a starts to increase rapidly by the internal pressure, and the airbag 10 starts to increase according to this movement. However, at the same time as the deployment, the volume of the airbag 10 rapidly increases, so the internal pressure decreases rapidly. At that time, the airbag 10 itself tries to increase due to the inertia force, but the airbag (until the internal pressure rises sufficiently) by the resistance of the stop and the holding member 14 in which the cylindrical regulating belt 11a starts to increase. The expansion to the elevation dimension of 10) stops.

In addition, in 1st Embodiment, since the center part of the airbag 10 cannot move to the upward dimension side, since the deployment speed to the upward dimension side, compared with the airbag part remaining in the holding member 14 starts to increase, In fact, it is decelerated in half, and the deterioration in elevation is reduced in comparison with the absence of the cylindrical regulating belt 11a.

The said effect is not limited to the cylindrical regulating belt 11a in 1st Embodiment, and it is the same also when the normal flat cylindrical regulating belt is provided.

 13A to 13D are diagrams showing an unfolded state of the airbag 10 of the airbag device M1 of the first embodiment. In order to contrast with the deployment state of the airbag 10 of the prior art shown in FIGS. 21A to 21D, FIGS. 13A to 13D show the deployment state of the airbag at the same time.

 In the timing of FIG. 13A, the shape of the airbag 10 during inflating and expanding is expanded and expanded by the surface portion thereof, and the size of the top and bottom of the deployed airbag 10 is approximately the same, and the airbag 10 has approximately two round shapes. It turns out that the position of the sewing part 10c which sealed the outer periphery edges of the shape cloth protrudes in the state near the handle 50. In other words, in the initial stage of the expansion and deployment, the airbag 10 is inflated and deployed in a substantially concentric manner in the folded-up order from the sewing portion 11c in which the central portion of the base fabric and the cylindrical regulating belt 11a are sealed.

 In the viewpoint of FIG. 13B, while the surface portion of the airbag 10 expands and expands on the upward dimension and the circumferential side, a part of the upper and lower portions of the rear portion is expanded and expanded on the rear side of the steering apparatus, not on the upward dimension. It is understood that the position of the sewing portion 10c is expanded and expanded in the state in the vicinity of the steering apparatus as in FIG. 13A. At the time of FIG. 13C, compared with the state of FIG. 13B, compared with the state of FIG. 13B, the surface part expands and expands further in the up dimension side and the circumferential side, and the upper part and the lower part of the back part expand and expand further also in the back side direction of a steering apparatus, The sewing part 10c It can be seen that the position of is still expanding and expanding in the stopped state in the vicinity of the steering apparatus in the same manner as in the state of FIG. 13B. It is understood from the viewpoint of FIG. 13D that the position of the sewing portion 10c moves from the vicinity of the steering apparatus to the up-dimension side and the back portion expands and expands to the up-dimension side.

 When the deployment state of the airbag 10 in the first embodiment is compared with that of the conventional airbag apparatus, at the timing of FIG. 20B of the conventional airbag apparatus, a lump of the airbag 10 pops out under the chin of the dummy and thereafter. 20C, the airbag covers the cheek from the jaw, and at the time in FIG. 20D, the face of the dummy is covered with the airbag, and the internal pressure of the airbag 10 rapidly rises around the lower jaw, resulting in a membrane phenomenon. I guess it is.

On the other hand, at the timing of FIG. 13B of the first embodiment, only the surface portion of the airbag 10 expands and expands to the up dimension side and the circumferential side, and the surface portion of the air bag 10 directly contacts the up dimension. At the time of FIG. 13C, even when the surface portion of the airbag 10 is further expanded and deployed on the upward dimension and the circumferential side, the membrane phenomenon occurs because only the surface portion of the airbag 10 is in contact with the upward dimension head portion. It is clear that this is being prevented. 13A to 13D show that the airbag is regularly deployed in order from the site to be originally deployed. Therefore, in the airbag apparatus M1 of 1st Embodiment, a membrane phenomenon does not arise in the state which the sewing part 10c caught by the neck in the largest diameter of the airbag 10. As shown in FIG.

 Next, the passenger-side airbag apparatus M2 which is 2nd Embodiment is demonstrated. As shown in FIG. 14, the airbag device M2 has a substantially rectangular cylindrical shape for accommodating the folded airbag 10A and the inflator 30A for supplying gas to the airbag 10, the airbag 10A, and the inflator 30A. Airbag cover 16A. In addition, the airbag apparatus M2 is substantially the same structure as the same member in the above-mentioned airbag apparatus M1, and attaches the code | symbol which attached A to the end of the same code | symbol, and demonstrates the structure of the airbag apparatus M2.

 The airbag cover 16A is provided with a tialine LA disposed in an H shape so as to be opened and closed on two cover parts 16Ab on the rear surface of the head of a substantially rectangular cylindrical shape, and the two cover parts ( 16Ab) is comprised so that the upper end side and the lower end side may open to both upper and lower sides as hinge part 16Ae, respectively, as seen from a figure. In addition, a substantially square cylindrical connecting wall portion 16Af protruding downward is disposed on the rear surface side of the head of the square pillar shape so as to surround the arrangement position of the two cover parts 16Ab.

 A plurality of locking holes 16Ag penetrate through a predetermined position of the wall portion facing in the vertical direction in the connecting wall portion 16Af. The engaging hook 24Ad formed in the base plate 24A is inserted into these locking holes 16Ag, and the locking hook 24Ad is caught by the connecting wall portion 16Af. The latching to the connecting wall portion 16Af of each locking hook 24Ad secures the connection state between the connecting wall portion 16Af and the base plate 24A, and the airbag 10A at the time of inflation is smoothly provided with two cover parts 16Ab. To break the tia line (LA).

 The base plate 24A is formed in a substantially rectangular parallelepiped shape made of a metal plate having a rectangular opening on the top side as shown in Fig. 14, so that the base plate 24A is formed from the outer periphery of the bottom wall portion 24Ae and the bottom wall portion 24Ae of the rectangular plate shape. It is comprised by providing the side wall part 24Af extended upward of the airbag cover 16A in substantially square cylinder shape. The bottom wall part 24Ae is formed in the rectangular plate shape extended in the left-right direction, and the inflator mounting opening which opened the upper side of the inflator 30A in the center and can be inserted circularly from the lower side to the upper side of the airbag cover 16A side is provided. (24 Ah)

 As shown in FIG. 14, the mounting hole 22Ag which can pass each bolt 22Ad of the cushion ring 22A is formed in the periphery of the inflator mounting opening 24Ah of the bottom wall part 24Ae. As shown in Fig. 14, the bottom wall portion 24Ae has a bracket 32 for connecting the base plate 24A to the body 60 side of the vehicle on the lower surface side of the left and right both sides of the bottom wall portion 24Ae. It is fixed. A nut for screwing a bolt to each bracket 32 is fixed. The bracket 60b which extends from the reinforcement 60a is arrange | positioned at the body 60 side, and the bolt penetrates the mounting position of the bracket 60b, and is screwed to the nut. By the fastening of each bolt to the nut, the airbag device M1 is fixed to the body 60 side.

Next, the assembling procedure of the airbag device M2 will be described with reference to FIGS. 14 and 15.

 FIG. 15 is an enlarged view showing the clamping state of the gas rectifying member 12A ', the airbag 10A, and the holding member 14A. The airbag 10A used as the airbag device M2 is the same as the airbag 10 of the airbag device M1, except that the cylindrical regulating belt 11a is equipped with the airbag 10A described in FIGS. 8A to 8D. 22 A of cushion rings are built-in, and the airbag 10A of the folded state is covered with the holding member 14A. The airbag 10A covered by the holding member 14A is accommodated in the airbag cover 16A, and the inflator mounting opening 24Ah of the base plate 24A is inserted into the threaded portion 22Ad of the cushion ring 22A to pass the cushion ring. The base plate 24A is overlapped with the base plate 24A, and the latch hook 24Ad of the base plate 24A is inserted into the locking hole 16Ag of the airbag cover 16A, and the back side of the base plate 24 is hooked. The nut from the screw.

Thereafter, the base plate 24A, the cushion ring 22A, and the inflator 30A are screwed. As a result, the gas rectifying member 12A ', the airbag 10A, and the retaining member 14A are sandwiched and fixed between the cushion ring 22A and the base plate 24A, and the assembly of the airbag device M2 is completed. do. In addition, the shape of the airbag cover 16A of the airbag apparatus M2 is not limited to this, What kind of shape is it made according to a mounting place, for example, the upper surface of an installation panel, etc.? You can decide.

 In addition, since the deployment operation of the airbag device M2 does not have a regulating belt as compared with the airbag device M1, there is no behavior such that the deployment to the upside side temporarily stops as described with reference to FIGS. 10 and 11, and the airbag rides. It expands and expands to the upward dimension while maintaining some internal pressure while expanding from the portion facing the original side. Even in the case where there is no regulating belt in this way, the gas rectifying member 12A 'expands the airbag in order from the surface of the upward dimension and receives resistance while expanding through the opening of 14A of the retaining member to expand to the upper dimension. At the same time that the airbag cover ruptures, the entire airbag pops up and becomes agglomerate, which does not act as a hazard to the ascension, and can prevent the punching phenomenon and the membrane phenomenon.

 Next, another passenger-side airbag device M3 according to the third embodiment will be described. The airbag apparatus M3 shown in FIG. 16 has the structure substantially the same as the same member in the above-mentioned airbag apparatuses M1 and M2, and attaches the code | symbol which attached B to the end of the same code | symbol. 16 is a schematic enlarged longitudinal sectional view of a passenger-side airbag device M3. The airbag device M3 includes a folded airbag 10B and an approximately circumferential inflator 30B for supplying gas contained in the airbag 10B and a diffuser 32B for storing the inflator 30B. It consists of the substantially square cylindrical airbag cover 16B which accommodates 10B and the inflator 30B.

 The airbag cover 16B is provided with a tee line LB disposed in an H shape so as to be opened and closed on two cover parts 16Bb on the rear surface of the head of a substantially rectangular cylindrical shape, and the two cover parts ( 16Bb) is comprised so that upper and lower sides may open to both upper and lower sides as hinge part 16Ae, respectively, when seen from a figure. In addition, a substantially square cylindrical connecting wall portion 16Bf protruding downward is disposed on the rear surface side of the head of the square pillar shape so as to surround the arrangement position of the two cover parts 16Bb. The fixing of the diffuser 32B to the airbag cover 16B is performed by inserting a bolt through the hole at a plurality of fixing positions of both members 32B and 16B, and fixing it through the hole (not shown). ).

 The diffuser 32B is disposed between the inflator 30B and the folded air bag 10B, and a plurality of discharge ports (not shown) capable of flowing out the expansion gas of the diffuser 32B are disposed. At the time of operation of the inflator 30B, the gas generated from the inflator 30B passes through the hole of the diffuser 32B to apply pressure to the central portion of the airbag that is folded and stored.

 Reference numeral 11B denotes a normal regulating belt that is not the cylindrical shape described above, and reference numeral 12B 'denotes a gas rectifying member. The two members 11B and 12B are inserted between the two members 32B and 16B at the time of fixing the diffuser 32B to the airbag cover 16B in a state where they overlap with the airbag 10B. It is mounted on the airbag device by fixing it. Moreover, as shown from FIG. 16, the airbag apparatus M3 which uses this kind of inflator 30B does not have the inflator mounting opening 10ah in the airbag 10B, and the communication which inserts the inflator 30B is carried out. The sphere is provided, and the inflator 30B is inserted in the communication port. Further, although not shown, a technique of introducing a gas of the inflator into the airbag through the communication port of the airbag from the outside of the airbag without inserting the inflator directly into the airbag as an airbag apparatus is well known. From this, each of the inflator mounting holes 10ah of the airbags 10 and 10A used in the airbag apparatuses M1 and M2, the communication port into which the inflator 30B is inserted, and the communication port of the known airbags are used to supply gas from the inflator. Since it has the same function as the communication port introduced into an airbag, when describing as an inflator communication port, it is used by the meaning containing the said inflator mounting hole, the communication port which inserts an inflator, and the communication hole of a well-known airbag.

 As described above, in the initial stage in which the gas from the inflators 30, 30A, 30B is discharged, as can be seen from the configuration of the airbag devices M1, M2, M3 shown in FIGS. 2, 14, and 16, the inflator 30 Gas generated from the discharge holes 30a, 30Aa and 30Ba of the airbags 30A and 30B is moved to the vicinity of the portion inflated at the initial stage of deployment of the airbag by the gas rectifying members 12 ', 12a' and 12B '. At the same time, the holding member 14 prevents inflation in the lateral direction of the airbag 10 so that the airbags 10, 10A, and 10B are regularly deployed from the site to be originally deployed, and are partially lumped. It is possible to prevent the punching phenomenon from jumping to the lift side.

 At this time, by arranging the airbags 10, 10A, and 10B folded around the outer circumferences of the protective members 12, 12a, and 12B, gas rectification is performed by the gas pressure of the inflators 30, 30A, and 30B. Since the airbags in which the members 12 ', 12a', and 12B 'are folded are compressed between the retaining members, the airbags 10, 10A, and 10B are firmly held by the compression force. In the initial stage of the deployment of the airbags 10, 10A, and 10B, the folded state collapses, and a partial lump is formed, which further prevents the punching phenomenon that protrudes on the riser side.

 In addition, when the airbags 10, 10A, and 10B are arranged as described above, the arrangement adds a force to the airbags 10, 10A, and 10B to the gas rectifying members 12 ', 12a', and 12B '. Since it becomes a structure accepting by this, special strength is not needed for the gas rectifying members 12 ', 12a', and 12B '. In addition, a protective member that originally protects only the peripheral portion 10d of the inflator communication port 10ah can be used as the gas rectifying members 12 ', 12a', and 12B 'and also as a protective member of the entire airbag inner surface. have. In addition, since the protective member originally spreads outward from the peripheral portion 10d of the inflator communication port 10ah, the protective member 12, 12a is disposed in the inner circumferential side of the folded airbags 10, 10A, and 10B. , (12B) has a wall which is actually folded and folded, and it is possible to obtain the same effect as protecting with 3 or 4 protection members as a single protection member, so that the entire airbag (10, 10A, 10B) is extremely Can protect efficiently.

 In the first embodiment, at the initial stage of deployment of the airbag 10 to be expanded and expanded, a sewing portion 10c which seals the outer peripheral portions of the cloth of the cloth of the surface portion of the airbag 10 and the cloth of the lower portion of the airbag 10 shown in FIG. 13A temporarily. ) Is not moved to the driver's seat side until the airbag internal pressure rises in the vicinity of the steering apparatus 50. For this reason, even in the OOP state in which the elevation dimension is not seated at the normal seating position, as shown in FIG. 13, the plane on the side of the elevation dimension of the airbag 10 always expands to contact the elevation dimension, and the airbag (10) There is also no fear of harm due to the phenomenon of the membrane caused by the sewing portion 10c, which is the largest neck portion. In addition, when the holding member 14 increases the resistance given at the time of deployment of the airbag 10, the punching phenomenon is further reduced. The same applies to the second and third embodiments.

 Although the cylindrical regulation belt 11a is provided in 1st Embodiment, the same effect | action and effect can also be exhibited also in a string-shaped regulation belt. In addition, even if there is no regulating belt, the holding member 14 holds the airbag 10 folded and stored in the upward dimension in the upward dimension to speed up the deployment speed of the airbag 10 toward the upward dimension and to reduce the punching phenomenon. At the same time, the entire airbag is inflated uniformly to quickly expand to a shape that can protect the elevation.

Further, in the first embodiment, the adaptation to the driver's seat airbag device M1 and the second and third embodiments have been described for the passenger seat airbag device M2. Thus, the present invention is for the driver's seat and the passenger seat. It is adaptable to the airbag device.

In addition, the airbag covers 16, 16A, and 16B are not essential, and the airbags 10 that are folded and stored by the restraint of the retaining members 14, 14A, and 14B with or without the airbag covers 16, 16A, and 16B are not required. , 10A, 10B) in order to develop correctly.

 In the first, second and third embodiments using the airbag covers 16, 16A and 16B in combination, the teelines L, LA and LB of the airbag covers 16, 16A and 16B and the airbags as described above. Arranging the initial deployment portions of (10, 10A, 10B) to face each other is effective in speeding up the onset of deployment. In addition, although 1st Embodiment demonstrated based on the airbag apparatus using a pilot type inflator, the same effect can be acquired even if it uses the inflator of any one of a hybrid and a store type, without being limited to this. In addition, the gas rectifying member is described as using a cloth such as an airbag base fabric, but various materials such as metal can be used without being limited thereto.

At the time of deployment of the airbag device, the flow of gas generated from the inflator is rectified by the gas rectifying member to rectify and guide the gas to the vicinity of the portion where the gas expands at the beginning of the deployment of the airbag, while at the same time the holding member prevents the airbag from expanding in the lateral direction. Therefore, it is possible to prevent the punching phenomenon that the airbag is correctly deployed in order from the area to be originally deployed, and partially lumps and jumps out on the elevation side.

 By arranging the folded airbags on the outer periphery of the gas rectifying member, the gas bag of the inflator compresses the folded airbag by folding the gas rectifying member between the retaining members due to the gas pressure of the inflator. Firmly maintained, the folded state collapses smoothly due to the impact of the initial stage of deployment of the airbag, thereby further preventing the punching phenomenon and the like.

Moreover, since it is the structure which receives the force added to a gas rectifying member by an air bag, a special strength is not needed for a gas rectifying member. A protective member that protects the periphery of the inflator communication port of the airbag can also be used as a rectifying member, and since the protective member spreads outward from the periphery of the original inflator communication port, the gas rectifying member actually overlaps when placed on the inner periphery side of the folded airbag. Since the folded wrinkles are formed, the same effects as those protected by three or four protective members can also be obtained as one protective member.

 As described above, the protection member which protects only the periphery of the inflator communication port can exhibit the function as the protection member of the entire airbag inner surface, and can protect the entire airbag extremely efficiently.

Claims (12)

The inflator and the inflator are in communication with the inflator. The inflated deployment of the airbag and the airbag by the gas generated from the inflator is held in a folded state, and the lateral expansion of the airbag is pressed to at least expand the airbag side direction by the gas generated from the inflator at the beginning of the airbag deployment. An airbag apparatus comprising a holding member for suppressing An airbag, characterized in that a gas rectifying member is formed around the inflator mounting hole in the center portion of the airbag is formed on a small corrugated surface to rectify and guide the gas generated from the inflator to the vicinity of the inflating portion at the beginning of the airbag deployment Device. In the airbag apparatus according to claim 1, And an air bag folded on the outer circumferential side of the gas rectifying member. In the airbag apparatus according to claim 1, The gas rectifying member has a cylindrical shape, and the airbag is provided with an inflator communication port communicating with an inflator, and the gas rectifying member extends from the periphery of the inflator communication port to the vicinity of the portion which expands at the initial stage of deployment of the airbag. Airbag device. In the airbag apparatus according to claim 1, And the gas rectifying member is made of a woven fabric. In the airbag apparatus according to claim 1, And the gas rectifying member is arranged as a member having a function of protecting the airbag from heat or shock pressure of the inflator. In the airbag apparatus according to claim 1, An airbag apparatus, wherein the airbag is folded in a cornice shape in an upward dimension direction. In the airbag apparatus according to claim 1, An airbag apparatus, characterized in that the retaining member is made of a woven fabric to be received while covering the airbag. In the airbag apparatus according to claim 1, An airbag device, characterized in that the holding member is housed in an airbag cover. In the airbag apparatus according to claim 8, The airbag device, wherein the airbag cover is provided with a tee line which ruptures when gas is generated from the inflator to form an opening of the airbag. The airbag device according to any one of claims 1 to 9, An airbag device, characterized in that a regulating belt is disposed in the airbag to regulate the length at which the airbag starts to extend to the ascension side of the airbag. The airbag device according to any one of claims 1 to 6, An airbag cover is used in place of the holding member. In the airbag apparatus according to claim 11, And a tialine at an opposing position of an inflated portion at the beginning of deployment of the airbag through which the protective member in the airbag cover rectifies and guides gas.

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